Well, the Hijri date 29 Shaban 1399 corresponds to the Gregorian date Monday, 23 July 1979. This date lies in the eighth month of the Hijri year 1399 AH, which is Shaban of 1399 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1399/08/29 is calculated using the Umm Al-Qura calendar and the sighting of the moon. One thing to remember is that this Arabic date may occur on different Gregorian date depending upon the region and country and obviously the moon.
If you are still not sure about the date then you can use our Arabic date converter.
The following is the conversion of the Gregorian date 23 July 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 29 Shaban 1399 AH to its equivalent Gregorian date.
وَلَوْ فَتَحْنَا عَلَيْهِم بَابًۭا مِّنَ ٱلسَّمَآءِ فَظَلُّوا۟ فِيهِ يَعْرُجُونَ
And even if We opened unto them a gate of heaven and they kept mounting through it,
Surah Al-Hijr(15:14)
Sahih al-Bukhari
Fighting for the Cause of Allah (Jihaad)
Chapter: Speaking with an unfamiliar accent
Narrated Jabir bin `Abdullah:
I said, "O Allah's Messenger (ﷺ)! We have slaughtered a young sheep of ours and have ground one Sa of barley. So, I invite you along with some persons." So, the Prophet (ﷺ) said in a loud voice, "O the people of the Trench! Jabir had prepared "Sur" so come along."
Sahih al-Bukhari 3070